They reportedly sought parity during 2013 negotiations, and while they received salary increases, it was not full parity. They were said to be willing to walk from the show over the issue this time around.

Vangsness and Cook have been with the drama since the beginning, and were originally guest stars before being promoted to series regulars.

However, one star that will not be returning is Damon Gupton (Supervisory Special Agent Stephen Walker), who revealed the news on Twitter.

wanted to let you know I appreciate this as I just lost my job. You throwing out the 1st pitch is pure class and a monumental image.